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#
# Copyright:: Copyright 2016, Chef Software Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require "singleton" unless defined?(Singleton)
require_relative "../client"
class Chef
module ChefFS
class FileSystemCache
include Singleton
def initialize
@cache = {}
Chef::Client.when_run_starts do
FileSystemCache.instance.reset!
end
end
def reset!
@cache = {}
end
def exist?(path)
@cache.key?(path)
end
def children(path)
@cache[path]["children"]
end
def set_children(path, val)
@cache[path] ||= { "children" => [] }
@cache[path]["children"] = val
val
end
def delete!(path)
parent = _get_parent(path)
Chef::Log.trace("Deleting parent #{parent} and #{path} from FileSystemCache")
if @cache.key?(path)
@cache.delete(path)
end
if !parent.nil? && @cache.key?(parent)
@cache.delete(parent)
end
end
def fetch(path)
if @cache.key?(path)
@cache[path]
else
false
end
end
private
def _get_parent(path)
parts = ChefFS::PathUtils.split(path)
return nil if parts.nil? || parts.length < 2
ChefFS::PathUtils.join(*parts[0..-2])
end
end
end
end
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